Question

9. What is the mass of:
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules?​

Answer 1

Explanation:

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Answer 2

Answer:(a)3.2g (b)9g

Explanation:

1 mole oxygen atom has mass 16g

Therefore 0.2 mole has 16 x 0.2 g i.e =3.2g

1 mole water has 18g(2 H and 1 O) hence 0.5 mole of water has 18x0.5

=9g

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